Dynamics of coupled spins in quantum dots with strong spin-orbit interaction
Dynamics of coupled spins in quantum dots with strong spin-orbit interaction
复制标题
具有强自旋轨道相互作用的量子点中耦合自旋的动力学
DOI：
10.1103/physrevb.79.121306
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发表时间：
2008
影响因子：
3.7
通讯作者：
R. Leturcq
中科院分区：
文献类型：
--
作者：
A. Pfund;I. Shorubalko;K. Ensslin;R. Leturcq
研究了InAs纳米线中双量子点的双电子自旋态随时间的变化。在这个系统中，自旋轨道相互作用对受限电子的自旋态有着重要的影响。通过泡利自旋阻塞配置泵浦单电子允许通过它们对泵浦电流的影响来探测两个耦合自旋的动力学。我们观察到自旋弛豫与磁场依赖性不同的GaAs点，这可以解释自旋轨道相互作用。振荡检测时间短于弛豫时间，我们归因于自旋态的相干演化。
We investigated the time dependence of two-electron spin states in a double quantum dot fabricated in an InAs nanowire. In this system, spin-orbit interaction has substantial influence on the spin states of confined electrons. Pumping single electrons through a Pauli spin-blockade configuration allowed to probe the dynamics of the two coupled spins via their influence on the pumped current. We observed spin-relaxation with a magnetic field dependence different from GaAs dots, which can be explained by spin-orbit interaction. Oscillations were detected for times shorter than the relaxation time, which we attribute to coherent evolution of the spin states.